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2021-06-30 / 4UC 414-122338 / (1403) Idelsonia

#OBSObserverOccMeth.Instr.CC TSRCUT1UT2UT3UT4UT2EUT3EDur.Chrd
1 show Yves Argentin O+ VID M305 FR GPS++ 21:02:59 21:03:42.36 21:03:45.64 21:04:28 0.04 0.04 3.28 22.6
2 show Bruno Delepine O+ CCD V112 FR NTP 20:57:45 21:02:49.16 21:02:52.83 21:04:15 0.15 0.15 3.67 25.3
3 show Matthieu Conjat O+ CCD M400 FR NTP 21:01:33 21:02:46.30 21:02:50.19 21:03:28 0.50 0.50 3.89 26.8
4 show E. Frappa/A. Klotz O+ CCD M250 FR GPS++ 21:02:01 21:02:48.98 21:02:53.40 21:05:13 0.22 0.22 4.42 30.5
5 show Leo Ludwig O- CCD V112 FR 20:58:02 21:05:34
6 show Patrice Le Guen O- CCD M203 FR 21:02:25 21:04:25
7 show Dorian Cazeneuve O- CCD V112 FR 21:00:03 21:06:02
8 show J. Asencio et al O- CCD V112 FR 21:00:01 21:05:59
9 show Sylvain Roux O- CCD V112 FR 20:58:09 21:06:07
10 show Christophe Gaschet O- CCD V112 FR 20:58:02 21:06:01
UT1/UT4: Begin/End of observation | UT2/UT3: Begin/End of occultation | Dur: Reported duration in seconds | Chrd: Corresponding chord length in km | More

10 observations found in db: euraster

Available (probably) matching predictions (click on the link to switch):
JPL#60 : 40ca068d-fdf0-4812-9ea0-d3e73cb4f0b7 [db: observed]

Using prediction 40ca068d-fdf0-4812-9ea0-d3e73cb4f0b7 for map and profile fit

Get observations as KML file (reduced site location resolution)

Ellipse and circular profile fits to the timings (chords)

Auto-Fit Result:
Size = 56 x 21 km
a',b' = 28.2, 10.4 km
X0,Y0 = 1324.5, 25.3 km
Mean diameter = 34 km

From 4 chords (VID,CCD)








You can enter space separated chord numbers (example: 11 4 8) or a method like VIS to ignore all visual timings, or a time source like RAD and NTP (but not GPS).
If the plot disappears, then there are less than 2 chords left (too much ignored, go back with browser).

Check SiMDA for size and mass data.

Check Johnston Archive for satellites.

Sky projection (artificial light) for occ. time: 2021-06-30, 21:03 UT (JD = 2459396.377)

DAMITQP (h)λ, βJD0JD-JD0φ0VersionModifiedVol-equiv DCmnt
# 26081.55.459 325°, 9° 2.450906e68490.40.0° None2018-07-19 not scaled 2018-07-18
# 26091.55.459 141°, 4° 2.450906e68490.40.0° None2018-07-19 not scaled 2018-07-18
Q: model quality flag (0-5, 5=highest) | P: rotation period | λ,β: ecl. lon. and lat. of spin axis (J2000) | JD: initial time (epoch) | φ0: initial rotation angle for JD0

   
Image size: 300px. Transparent image background for copy & paste

Map with groundtrack and observer stations

Event Details
 Occultation UUID [and DB] : 40ca068d-fdf0-4812-9ea0-d3e73cb4f0b7 [observed]

 Occultation Date + Time   : 2021-06-30 at 20:57:24 UT +/- 0.03 min  [1]
 Object Designation        : (1403) Idelsonia
 Orbit Class               : MBA
 Star Designation          : GDR3 4207708236459496192
 Star Coordinates (ICRF)   : RA = 19 26 22.9427, DE = -07 16 44.792  [2]
 Star Magnitudes           : G = 11.31 mag, RP = 10.48 mag, BP = 12.05 mag
 Object Magnitude          : V = 14.29 mag
 Estimated Magnitude Drop  : 3.1 mag
 Estimated Max. Duration   : 4.7 sec
 Object Mean Diameter      : 33 km  (src: astorb)
 Speed of the shadow       : 6.9 km/s
 Elongation to Moon & Sun  : 68° (sunlit = 60%), Sun = 161°
 Cross-track uncertainty   : 1.3 mas = 1 km = 0.03 path-width (1-sig)
 RUWE and duplicate source : 0.88 mas, dup.src = 0  (0:false, 1:true)

 Ephemeris Reference       : JPL#60

 
 [1] time t0 of closest geocentric approach c/a, [2] including proper motion until t0

More Data and Informations
SiMDA | 3D Asteroid Catalogue | Johnston Archive | Star at CDS (Vizier) | JPL Small-Body Node | Minor Planet Center | Wikipedia
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